Integrated Furnace Control - Cnt02871 - American Standard 50A65-475 Manual

Integrated Furnace Control – CNT2871
Two Stage Heat – Silicon Nitrate Surface Ignitor
Variable Speed Vent Motor and Standard Four Speed Blower
E6
LINE-N
E7
CIR-N
E9
EAC-N
E8
HUM-N
Plug # E4
1. Transformer
1
Neutral
2
2. Ignitor Neutral
3
3. Inducer Neutral
4. Air Cleaner Hot
5. Ignitor Hot
6. Humidifier Hot
E11
XFMR-H
E5
IND-H
E10
LINE-H
E12
COOL
E13
HI HEAT
E14
LO HEAT
E15
PARK
E16
PARK
Electrical Rating:
Input: 25 VAC, 60 Hz.
XFRMR Sec, Current: 500 MA
MV Output: 1.5 A @ 24 VAC
IGN Output: 2.0 A @ 120 VAC
Cir. Blower Output: 14.5 FLA, 25.0 LRA @ 120 VAC
Prepurge: 0 Seconds
Interpurge: 60 Seconds
Postpurge: 5 Seconds
Ignitor Warm-up: 20 Seconds
Trial for Ignition: 4 Seconds Maximum
Retries: 2
Recycle: 10
Cool On Delay: 2 Seconds
Heat On Delay: 45 Seconds
Q14
U2
X-R
K7
E4
4
5
6
K3
RV2
K3
K2
K1
TWIN G
50V65495
CNT02871
TWIN G
RED
DIAGNOSTIC
LED
DS1
INDUCER
GREEN
LED
1
2
3
S1
OFF ON
K4
K6
C12
C13
W2 W1 B Y R
W2 W1 B Y R
Cool "Off" Delay
SW1
On
Off
Heat "Off" Delay
SW2 SW3
On Off
On On
Off On
Off Off
* Factory Settings
21
U1
Plug # E2
1. RPM/SOA Vent
DS2
TEST JUMPER
W1
E2 2. +13 V.D.C. Power
3. Ground
1
4. Inducer Low Speed
2
3
5. Inducer High Speed
4
5
Plug # E3
1. Main Valve High
E3
3 1
2
2. Main Valve Common
6 5 4
3. High Limit In
4. High Limit Out
9 8 7
5. 24 VAC Transformer
W2
5 AMP
6. Main Valve
E1
7. 24 VAC Transformer
8. Ground
9. Flame Sense Probe
Secs
0*
80
Secs
60
100*
140
180
Motor Report Line
Out
On/Off Line 1 V.D.C.
On, 11 V.D.C. Off
On/Off Line 1 V.D.C.
On, 11 V.D.C. Off
Second Stage
Common Side
Low First Stage
Hot Side